Outline of a Decision Procedure for Ethics
John Rawls
The Principles of Philosophy known as Monadology
Gottfried Wilhelm Leibniz & Jonathan Bennett
Proposed Roads to Freedom: Socialism, Anarchism and Syndicalism
Bertrand Russell
Coulda, Woulda, Shoulda
Stephen Yablo
Math and Logic Games: A Book of Puzzles and Problems
Franco Agostini